heartgold and soulsilver before and after elite four and other ds ones after elite four
Unfortunately, in Pokemon Black and White, you cannot interact, (trade, battle etc.), with the other versions, (Platinum, Silver, Emerald etc.). only with Black and White is where you can interact.
In order to expand, you need to interact with Pokemon Black. Then go to Black City. You need to persuade people to move out into White Forest.
You have to interact with a friend's copy of Black or White via Entralink. Then you have to go to their Black City or White Forest and talk to the trainers in their City/Forest.
You can trade the DS Pokemon games onto Pokemon Black and White when you have the national pokedex and have found sort of the pal park in black and white.
No, not in the games.
Yes, you can do it. (P.S. I have done it before)
There are no pokemon after pokemon blACK and white but there will be more pokemon games in the future.
You have to interact with a friends game through Entralink and talk with the trainers in their Black City/White Forest.
The new games will be called Pokemon Black 2 and Pokemon White 2. The main legendaries are Black Kyurem (in Pokemon Black 2) and White Kyurem (in Pokemon White 2). The japanese games are set to come out in June 2012 and the english games are rumored to release later this year.Edit: The english games are set for fall 2012.
all Forget the previous answer and play black/white then black/white 2
Nimbasa City \
No.